The brazen terror attacks in Paris carried out by the Islamic State (ISIS) jihadist group have sparked heated debates on whether or not the United States and other Western countries should continue accepting migrants from conflict areas in the Middle East.
The debates were due to the fact that at least three individuals linked to the Paris terror attacks, including mastermind Abdelhamid Abaaoud, were said to have posed as refugees to plot and carry out the terrorist activity.
Recently, a 99-page manifesto believed to have been published by ISIS militants gave more weight to arguments against accepting new refugees from war-torn Syria and other hotbeds of radical Islam.
In the document entitled "Black Flags From Rome," the ISIS confidently brags about having exploited the refugee programme of European nations to send its fighters into the continent as early as 2012.
"No doubt, some of these refugees were undercover fighters of Al Qa'idah and the Islamic State," the ISIS itself admits in its manifesto.
The jihadist organisation also makes a mockery of how European intelligence agencies have failed to foil its scheme of taking advantage of the refugee programme.
"They were quick to take the opportunity of entering into the different countries of Europe (most probably as early as 2012). All this was happening under the nose of the European intelligence services whose job during this time (2012) was only to prevent European Muslims from entering Syria," the ISIS manifesto reads.
The extremist group also claims that it already has a presence in all countries in Europe last year.
"There were small armies of the Islamic State within every country of Europe by late 2014, and the intelligence agencies didn't even know about it!" the ISIS document states.
Furthermore, the ISIS boasts about the fighting skills of the armies it set up in Europe.
"Their locations were unknown, and police raids wouldn't even have the same impact as unarmed lone wolf terrorists' (sic), because these young men were armed and able to shoot back in groups," the jihadist organisation says.
More alarmingly, the ISIS encourages radicalised Muslims to create more "no go zones" in European countries, where even police officers will be "uncomfortable."
"Al Qa'idah, the Islamic State and many Mujahideen groups thrived in areas where there was lawlessness because they could buy smuggled goods from the black market and train without fear of police. If police did come, the people in the area would inform everyone because this was a no-go zone for the police," the manifesto reads.
